Distant galaxy clusters in the COSMOS field found by HIROCS
Abstract
We present the first high-redshift gal axy cluster candidate sample from the HIROCS survey found in the COSMOS field. It results from a combination of public COSMOS with proprietary H-band data on a 0.66 square° part of the COSMOS field and comprises 12 candidates in the redshift range 1.23 ≤ z ≤ 1.55. We find an increasing fraction of blue cluster members with increasing redshift. Many of the blue and even some of the reddest member galaxies exhibit disturbed morphologies as well as signs of interaction.
Based on observations collected at the Centro Astronómico Hispano Alemán (CAHA) at Calar Alto, operated jointly by the Max-Planck-Institut für Astronomie and the Instituto de Astrofísica de Andalucía (CSIC).- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- October 2007
- DOI:
- 10.1051/0004-6361:20078063
- arXiv:
- arXiv:0709.0411
- Bibcode:
- 2007A&A...474L...5Z
- Keywords:
-
- surveys;
- galaxies: clusters: general;
- galaxies: high-redshift;
- galaxies: photometry;
- Astrophysics
- E-Print:
- 5 pages, 5 figures, in print format, accepted for publication by A&